Class: Linguify::Linguified

Inherits:
Object
  • Object
show all
Defined in:
lib/linguify/linguified.rb,
lib/linguify/translators/javascript.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(str, bind) ⇒ Linguified

Lingquify a sentence

Parameters:

  • string (String) —

    A plain English string, or a plain English string with reductions in it.

  • binding (Binding) —

    See Kernel#eval



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# File 'lib/linguify/linguified.rb', line 38

def initialize str,bind

  #
  # reduction loop
  #
  @sentence = str.dup
  @bind = bind
  @stack = [ str ]
  loop do
    rule = find_rule(str)

    reduction = rule[:proc].to_reduction :returns  => rule[:result],
                                         :lang     => rule[:lang],
                                         :inline   => rule[:inline],
                                         :regexp   => rule[:match].inspect,
                                         :args     => rule[:match].match(str).to_a

    str = Linguified.reduce_string(str,rule[:match],reduction.to_rexp)
    @stack << str

    break if /^{:[0-9]*}$/ =~ str
  end

  @merged_code = []

  #
  # successfully reduced entire string, compile it
  #

  code = Reduction::parse(str).compile

  Sexp.inline_keyword_inlined!(code)

  #if @dispatch_exceptions
  #  @sexy = Sexp.debug_envelope(code)
  #else
    @sexy = Sexp.lambda_envelope(code)
  #end

  # let ruby compile a proc out of the actual code
  # the trampoline function will receive the compiled Proc
  @@me = self
  eval to_ruby(
      Sexp.new(:call,
        Sexp.new(:colon2, Sexp.new(:const, :Linguify), :Linguified), :trampoline, Sexp.new(:arglist, Sexp.new(:lvar, :code))
      )
    ),bind
end

Instance Attribute Details

#proc ⇒ Object

Returns the value of attribute proc.



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# File 'lib/linguify/linguified.rb', line 31

def proc
  @proc
end

#sentence ⇒ Object

Returns the value of attribute sentence.



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# File 'lib/linguify/linguified.rb', line 31

def sentence
  @sentence
end

Class Method Details

.cache ⇒ Object 



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# File 'lib/linguify/linguified.rb', line 214

def self.cache
  @@cache ||= {}
end

.has_needle_on_word_boundary?(splitted) ⇒ Boolean

Test if a informative split contains needles on word boundaries

Parameters:

  • the (Array) —

    splitted string

Returns:

  • (Boolean) 


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# File 'lib/linguify/linguified.rb', line 147

def self.has_needle_on_word_boundary? splitted
  return true if splitted.size == 1 and splitted.first == :needle

  prev_ends_with_space = true
  following_needle     = true

  splitted.each_with_index do |split,i|
    if split.kind_of? String
      return true if following_needle and prev_ends_with_space and split[0] == ' '

      prev_ends_with_space = (split[-1] == ' ')
      following_needle = false
    else # :needle
      following_needle = true
    end
  end
  following_needle && prev_ends_with_space
end

.informative_split(str, needle) ⇒ Object

Split a string by given search needle into an array with split indicators

Parameters:

  • the (String) —

    string to search (haystack)

  • needle (String) —

    (search needle)



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# File 'lib/linguify/linguified.rb', line 127

def self.informative_split str,needle
  splitted = str.split(needle)
  if str.index(needle) > 0
    splitted.map{ |m| [m,:needle] }.flatten[0..splitted.size+str.scan(needle).size-1]
  else
    if splitted.size > 0
      splitted.map{ |m| [m,:needle] }.flatten[1..-2]
    elsif str == needle
      [ :needle ]
    else
      []
    end
  end
end

.reduce_string(str, match_expression, reduction) ⇒ Object

Reduce a string with a matching reduction expression

Parameters:

  • the (String) —

    sentence to reduce (haystack)

  • the (Regexp) —

    reduction expression (search needle)

  • the (String) —

    replacement



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# File 'lib/linguify/linguified.rb', line 94

def self.reduce_string str,match_expression,reduction
  match = match_expression.match(str).to_a
  needle = match.first
  splitted = Linguified.informative_split(str,needle)
  if match.size == 1
    prev = ' '
    i = -1
    splitted.map! do |split|
      prev = splitted[i] if i>=0
      nxt  = splitted[i+2] || ' '
      i += 1
      if split.kind_of?(Symbol)
        if prev[-1] == ' ' and nxt[0] == ' '
          reduction
        else
          needle
        end
      else
        split
      end
    end
    splitted.join
  else
    splitted.map{ |split| split.kind_of?(Symbol) ? reduction : split }.join
  end
end

.trampoline(code) ⇒ Object 



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# File 'lib/linguify/linguified.rb', line 210

def self.trampoline code
  @@me.register_code code
end

Instance Method Details

#dent ⇒ Object 



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# File 'lib/linguify/translators/javascript.rb', line 530

def dent
  @indenture ||= ''
  @indenture = @indenture[2..-1]
end

#find_rule(str) ⇒ Object

Find a reduction rule for the string

Parameters:

  • string (String) —

    A plain English string, or a plain English string with reductions in it.



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# File 'lib/linguify/linguified.rb', line 170

def find_rule str
  found = Linguify.rules.select do |rule|
    if rule[:match] =~ str
      # ok, it matched, but only alow matches with word boundaries
      match = rule[:match].match(str).to_a
      needle = match.first
      Linguified.has_needle_on_word_boundary? Linguified.informative_split(str,needle)
    else
      false
    end
  end
  if found.size == 0
    pp @stack
    raise "no step definition for #{str}"
  end
  found[0]
end

#indent ⇒ Object 



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# File 'lib/linguify/translators/javascript.rb', line 516

def indent
  @indenture ||= ''
  @indenture += '  '
end

#indenture ⇒ Object 



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# File 'lib/linguify/translators/javascript.rb', line 520

def indenture
  @indenture ||= ''
  @indenture
end

#indenture=(str) ⇒ Object 



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# File 'lib/linguify/translators/javascript.rb', line 524

def indenture= str
  @indenture = str
end

#new_line ⇒ Object 



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# File 'lib/linguify/translators/javascript.rb', line 527

def new_line
  "\n" + indenture
end

#register_code(code) ⇒ Object 



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# File 'lib/linguify/linguified.rb', line 206

def register_code code
  @proc = code
end

#run ⇒ Object 



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# File 'lib/linguify/linguified.rb', line 198

def run
  begin
    @proc.call
  rescue Exception => e
    $stderr.puts e
  end
end

#to_js(sexy = @sexy) ⇒ Object 



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# File 'lib/linguify/translators/javascript.rb', line 535

def to_js sexy = @sexy
  Ruby2Js.new.process(sexy)
end

#to_ruby(additional = nil) ⇒ Object 



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# File 'lib/linguify/linguified.rb', line 192

def to_ruby additional=nil
  clone = Marshal.load(Marshal.dump(@sexy)) # sexy is not cleanly duplicated
  clone << additional if additional
  Ruby2Ruby.new.process(clone)
end

#to_sexp ⇒ Object 



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# File 'lib/linguify/linguified.rb', line 188

def to_sexp
  @sexy
end